I dont give a **** about conspiracy theory, but if you are going to take the time and effort to disprove falsities, at least do it properly. Why heat it to 1800 degrees when jet fuel only burns as hot as 1500. Anyone looking to poke a hole in this doesn't have to try to hard...
Probably because it cools down a bit. Still it is too hot for a proper comparison. Guy should have taken 1500°C or maybe 50 or so more at max.
However:
""Steel loses about 50 percent of its strength at 1100°F," notes senior engineer Farid Alfawak-hiri of the American Institute of Steel Construction. "And at 1800° it is probably at less than 10 percent." NIST also believes that a great deal of the spray-on fireproofing insulation was likely knocked off the steel beams that were in the path of the crashing jets, leaving the metal more vulnerable to the heat." www.popularmechanics.com/military/a6384/debunking-911-myths-world-trade-center/
But yeah you probably only wanted to critique his way of claiming it rather than the claim overall. Still easier to comment this stuff in 1 comment rather than 2 or so.